Computer · Tunnel Engineering
The length of the needle beam used in the needle beam method of tunneling is usually:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 15 m to 6 m✓
- 26 m to 7 m
- 31.5 m to 4.5 m
- 42 m to 4 m
Correct answer
5 m to 6 m
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